Question

PLS HELP i will give 10 points

In Mendeleev’s Periodic Table, why was there no mention of Noble gases like Helium, Neon and Argon?

Answer 1

Answer:Answer choices are:

A. These elements did not fit in with his pattern.

B. These elements are gases and he didn't include gases.

C. The atoms of these elements had no atomic mass.

D. These elements had not yet been discovered.

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Correct answer choice is:

D. These elements had not yet been discovered.